Spraying device for powdered material



Oct. 4, 1932. L. J. DUGAS 1,830,244

SPRAYING DEVICE FOR POWDERED MATERIAL Filed Oct. a. 1928 \/E ii iadmidflmgaws Patented Oct. 4, 1932 UNITED STAES' v,asaz

LODIAS J. ID'U'GAS, OF CHICAGO, ILLINOIS, ASSIGNOR "1'0 D'U-GAS FIRE EXTING'UISHER l CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE SPRAYING DEVICE FOR PCWDERED MATERIAL Application filed October 8, 1928. Serial No. 311,172.

This invention relates to a spraying device for powdered material, and more particularly to a device for spraying powdered fire extinguishing material in connection with a 5 stationary system as installed in buildings,

factories and the like.

It is an object of this invention to provide 7 a device for spraying powdered material that will not become clogged by the powdered 1 material getting between the bearing surfaces of the device.

Other and further important objects of this invention will become apparent from the following description and appended claims.

On the drawing:

Figure 1 is an elevational view showing one of the devices embodying this invention;

Figure 2 is a sectional yiew taken on line HII of Figure 1 and Figure 3 is an enlarged longitudinal sectional view of the spraying head with parts in elevation.

The reference numeral 1 indicates as a whole a spray device embodying the princi- 25 ples of this invention, and adapted to be mounted upon apipe 2 extending downwardly from a ceiling 3 or other surface. This spraying device 1 comprises a tubular memher 4 having. an upper threaded end 5 adapted 30 to be connected by means of a union 6 to the piping 2. Said tubular member 4 is provided with flattened faces 7 to facilitate the engagement of the said tubular member by a wrench or the like. e

The lower end of said tubular member 4 is 8 providing an armular shoulder 9-. bushing 10 is adapted to be swivelly' mounted upon the end of said tubular member 4 and for this purpose is provided with an open- 1ng11 for receiving the tubular member 4' formed with an enlarged cylindrical ortion-- Said bushing 10 is also provided with an open internally threaded end15, a shoulder '16 being formed at the bottom of said thread 'is adapted to be threaded into the open internally threaded end- 15 of the bushing 10. In this position the end of the spray head 19 abuts against the disc washer 17 as at 20, thus further protecting friction bear ng race 13.

and sealing the anti- Said spray'head 19 forms a chamber 21 into whichare threaded radially extending tubular' arms 22, there being provided threaded said spray head 19. Said tubular spray arms 22 are provided with bent offset ends 23.

These oflset ends'23 may lie in the same plane as the main portion of the tubular arms 22 or may be slightlydownwardly directed.

n operation the powdered fire extinguishing material suspended in a carrying gas,

such as nitrogen, is forced under considerable pressure through the tubular member 4 into V apertures 23 extending through'the wall of the hollow chamber 21 from which the as and powder is discharged through the tu ular arms 22. The reaction forces set up by' the issuing streams of gas and powder cause the tubular spray arms 22 and spray head 19 to revolve rapidly upon the swivel mounting provided by the bushing 10, anti-friction bearings 14 and tubular member 4.

- The efiect is to spraya cloud of the fire extinguishing powder in theform of an umbrella that will completely surround and enof this invention lies in the constructionof a spraying device, wherein the bearing surfaces and more particularly the anti-friction bearing chamber are completely enclosed and pro tected against the. intrusion ofparticles of the powdered fire extinguishing material. In these spraying devices, there is no danger of the owdered material penetrating between the caring surfaces to clog the device and prevent it from freely rotating upon its swivel mounting.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted hereon otherwise then necessitated by the prior art.

I claim as my invention:

1. A device for spraying powdered material, comprising a hollow tubular member having an enlarged cylindrical portion forming an annular shoulder, a recessed bushing adapted to be swivelly mounted upon said tubular member with said shoulder spaced from the bottom of said recess, antifriction bearings positioned in said space, a flat disc washer positioned upon the end of said tubular member extending beyond the periphery of said cylindrical portion and a.

hollow apertured head secured 'to said bushing and abuttin said washer.

2. A device or spraying powdered material,- comprising a hollow tubular member having an enlarged cylindrical portion forming an annular shoulder, a recessed bushin having an open internally threaded an adapted to be swivelly mounted upon said tubular member with said shoulder s aced from the bottom of said recess, anti-frlction bearings positioned in said space, a flat disc washer positioned upon the end of said tubular member extending beyond the peri hery of said cylindrical portion and a hol ow apertured head threaded into the open end 6 said bushing and abutting said washer.

3. A device for Spraying powdered material, comprising a hollow tubular member having an enlarged cylindrical portion form ing anannular shoulder, a recessed bushing adapted to be swivelly mounted upon said tubular member with said shoulder s aced y from the bottom of said recess, anti-frlction said tubular members with said shoulder spaced from the bottom of the smaller counterbore, anti-friction bearings positioned in said space, a fiat disc washer positioned upon the end of said tubular member and extending beyond the periphery thereof, overlying v the surface between the first and second counlterbores, and a hollow apertured head se- (lured to said bushing and abutting said washer, and radially extending tubes havin offset ends secured in said apertured hea In testimony whereof I have hereunto subscribed my name at Chicago, Cook county,

Illinois.

1 LODIAS J. DUGAS. 

